But why did it do it with 2 different motors. Thats the bit I don't understand.
When I swapped the motor and wheel assemblies between the two lights. The same light had the same problem, and the "faulty" motor and wheel worked fine in the other light.
I know what you mean about the motors being stepped, and it must have been that I just needed to move the wheel around once it had found it's stop. I just don't see how I would need to do this with 2 different motor and wheel assemblies.
Thanks again for taking the time to try and help me with this. Like I said earlier the problem is now sorted, and maybe the only problem now is me.